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SDL_render.c
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/*
Simple DirectMedia Layer
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Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../SDL_internal.h"
/* The SDL 2D rendering system */
#include "SDL_assert.h"
#include "SDL_hints.h"
#include "SDL_log.h"
#include "SDL_render.h"
#include "SDL_sysrender.h"
#include "software/SDL_render_sw_c.h"
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#if defined(__ANDROID__)
# include "../core/android/SDL_android.h"
#endif
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#define SDL_WINDOWRENDERDATA "_SDL_WindowRenderData"
#define CHECK_RENDERER_MAGIC(renderer, retval) \
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SDL_assert(renderer && renderer->magic == &renderer_magic); \
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if (!renderer || renderer->magic != &renderer_magic) { \
SDL_SetError("Invalid renderer"); \
return retval; \
}
#define CHECK_TEXTURE_MAGIC(texture, retval) \
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SDL_assert(texture && texture->magic == &texture_magic); \
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if (!texture || texture->magic != &texture_magic) { \
SDL_SetError("Invalid texture"); \
return retval; \
}
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/* Predefined blend modes */
#define SDL_COMPOSE_BLENDMODE(srcColorFactor, dstColorFactor, colorOperation, \
srcAlphaFactor, dstAlphaFactor, alphaOperation) \
(SDL_BlendMode)(((Uint32)colorOperation << 0) | \
((Uint32)srcColorFactor << 4) | \
((Uint32)dstColorFactor << 8) | \
((Uint32)alphaOperation << 16) | \
((Uint32)srcAlphaFactor << 20) | \
((Uint32)dstAlphaFactor << 24))
#define SDL_BLENDMODE_NONE_FULL \
SDL_COMPOSE_BLENDMODE(SDL_BLENDFACTOR_ONE, SDL_BLENDFACTOR_ZERO, SDL_BLENDOPERATION_ADD, \
SDL_BLENDFACTOR_ONE, SDL_BLENDFACTOR_ZERO, SDL_BLENDOPERATION_ADD)
#define SDL_BLENDMODE_BLEND_FULL \
SDL_COMPOSE_BLENDMODE(SDL_BLENDFACTOR_SRC_ALPHA, SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA, SDL_BLENDOPERATION_ADD, \
SDL_BLENDFACTOR_ONE, SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA, SDL_BLENDOPERATION_ADD)
#define SDL_BLENDMODE_ADD_FULL \
SDL_COMPOSE_BLENDMODE(SDL_BLENDFACTOR_SRC_ALPHA, SDL_BLENDFACTOR_ONE, SDL_BLENDOPERATION_ADD, \
SDL_BLENDFACTOR_ZERO, SDL_BLENDFACTOR_ONE, SDL_BLENDOPERATION_ADD)
#define SDL_BLENDMODE_MOD_FULL \
SDL_COMPOSE_BLENDMODE(SDL_BLENDFACTOR_ZERO, SDL_BLENDFACTOR_SRC_COLOR, SDL_BLENDOPERATION_ADD, \
SDL_BLENDFACTOR_ZERO, SDL_BLENDFACTOR_ONE, SDL_BLENDOPERATION_ADD)
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#define SDL_BLENDMODE_MUL_FULL \
SDL_COMPOSE_BLENDMODE(SDL_BLENDFACTOR_DST_COLOR, SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA, SDL_BLENDOPERATION_ADD, \
SDL_BLENDFACTOR_DST_ALPHA, SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA, SDL_BLENDOPERATION_ADD)
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#if !SDL_RENDER_DISABLED
static const SDL_RenderDriver *render_drivers[] = {
#if SDL_VIDEO_RENDER_D3D
&D3D_RenderDriver,
#endif
#if SDL_VIDEO_RENDER_D3D11
&D3D11_RenderDriver,
#endif
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#if SDL_VIDEO_RENDER_METAL
&METAL_RenderDriver,
#endif
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#if SDL_VIDEO_RENDER_OGL
&GL_RenderDriver,
#endif
#if SDL_VIDEO_RENDER_OGL_ES2
&GLES2_RenderDriver,
#endif
#if SDL_VIDEO_RENDER_OGL_ES
&GLES_RenderDriver,
#endif
#if SDL_VIDEO_RENDER_DIRECTFB
&DirectFB_RenderDriver,
#endif
#if SDL_VIDEO_RENDER_PSP
&PSP_RenderDriver,
#endif
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#if SDL_VIDEO_RENDER_SW
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&SW_RenderDriver
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#endif
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};
#endif /* !SDL_RENDER_DISABLED */
static char renderer_magic;
static char texture_magic;
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static SDL_INLINE void
DebugLogRenderCommands(const SDL_RenderCommand *cmd)
{
#if 0
unsigned int i = 1;
SDL_Log("Render commands to flush:");
while (cmd) {
switch (cmd->command) {
case SDL_RENDERCMD_NO_OP:
SDL_Log(" %u. no-op", i++);
break;
case SDL_RENDERCMD_SETVIEWPORT:
SDL_Log(" %u. set viewport (first=%u, rect={(%d, %d), %dx%d})", i++,
(unsigned int) cmd->data.viewport.first,
cmd->data.viewport.rect.x, cmd->data.viewport.rect.y,
cmd->data.viewport.rect.w, cmd->data.viewport.rect.h);
break;
case SDL_RENDERCMD_SETCLIPRECT:
SDL_Log(" %u. set cliprect (enabled=%s, rect={(%d, %d), %dx%d})", i++,
cmd->data.cliprect.enabled ? "true" : "false",
cmd->data.cliprect.rect.x, cmd->data.cliprect.rect.y,
cmd->data.cliprect.rect.w, cmd->data.cliprect.rect.h);
break;
case SDL_RENDERCMD_SETDRAWCOLOR:
SDL_Log(" %u. set draw color (first=%u, r=%d, g=%d, b=%d, a=%d)", i++,
(unsigned int) cmd->data.color.first,
(int) cmd->data.color.r, (int) cmd->data.color.g,
(int) cmd->data.color.b, (int) cmd->data.color.a);
break;
case SDL_RENDERCMD_CLEAR:
SDL_Log(" %u. clear (first=%u, r=%d, g=%d, b=%d, a=%d)", i++,
(unsigned int) cmd->data.color.first,
(int) cmd->data.color.r, (int) cmd->data.color.g,
(int) cmd->data.color.b, (int) cmd->data.color.a);
break;
case SDL_RENDERCMD_DRAW_POINTS:
SDL_Log(" %u. draw points (first=%u, count=%u, r=%d, g=%d, b=%d, a=%d, blend=%d)", i++,
(unsigned int) cmd->data.draw.first,
(unsigned int) cmd->data.draw.count,
(int) cmd->data.draw.r, (int) cmd->data.draw.g,
(int) cmd->data.draw.b, (int) cmd->data.draw.a,
(int) cmd->data.draw.blend);
break;
case SDL_RENDERCMD_DRAW_LINES:
SDL_Log(" %u. draw lines (first=%u, count=%u, r=%d, g=%d, b=%d, a=%d, blend=%d)", i++,
(unsigned int) cmd->data.draw.first,
(unsigned int) cmd->data.draw.count,
(int) cmd->data.draw.r, (int) cmd->data.draw.g,
(int) cmd->data.draw.b, (int) cmd->data.draw.a,
(int) cmd->data.draw.blend);
break;
case SDL_RENDERCMD_FILL_RECTS:
SDL_Log(" %u. fill rects (first=%u, count=%u, r=%d, g=%d, b=%d, a=%d, blend=%d)", i++,
(unsigned int) cmd->data.draw.first,
(unsigned int) cmd->data.draw.count,
(int) cmd->data.draw.r, (int) cmd->data.draw.g,
(int) cmd->data.draw.b, (int) cmd->data.draw.a,
(int) cmd->data.draw.blend);
break;
case SDL_RENDERCMD_COPY:
SDL_Log(" %u. copy (first=%u, count=%u, r=%d, g=%d, b=%d, a=%d, blend=%d, tex=%p)", i++,
(unsigned int) cmd->data.draw.first,
(unsigned int) cmd->data.draw.count,
(int) cmd->data.draw.r, (int) cmd->data.draw.g,
(int) cmd->data.draw.b, (int) cmd->data.draw.a,
(int) cmd->data.draw.blend, cmd->data.draw.texture);
break;
case SDL_RENDERCMD_COPY_EX:
SDL_Log(" %u. copyex (first=%u, count=%u, r=%d, g=%d, b=%d, a=%d, blend=%d, tex=%p)", i++,
(unsigned int) cmd->data.draw.first,
(unsigned int) cmd->data.draw.count,
(int) cmd->data.draw.r, (int) cmd->data.draw.g,
(int) cmd->data.draw.b, (int) cmd->data.draw.a,
(int) cmd->data.draw.blend, cmd->data.draw.texture);
break;
}
cmd = cmd->next;
}
#endif
}
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static int
FlushRenderCommands(SDL_Renderer *renderer)
{
int retval;
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SDL_assert((renderer->render_commands == NULL) == (renderer->render_commands_tail == NULL));
if (renderer->render_commands == NULL) { /* nothing to do! */
SDL_assert(renderer->vertex_data_used == 0);
return 0;
}
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DebugLogRenderCommands(renderer->render_commands);
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retval = renderer->RunCommandQueue(renderer, renderer->render_commands, renderer->vertex_data, renderer->vertex_data_used);
/* Move the whole render command queue to the unused pool so we can reuse them next time. */
if (renderer->render_commands_tail != NULL) {
renderer->render_commands_tail->next = renderer->render_commands_pool;
renderer->render_commands_pool = renderer->render_commands;
renderer->render_commands_tail = NULL;
renderer->render_commands = NULL;
}
renderer->vertex_data_used = 0;
renderer->render_command_generation++;
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renderer->color_queued = SDL_FALSE;
renderer->viewport_queued = SDL_FALSE;
renderer->cliprect_queued = SDL_FALSE;
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return retval;
}
static int
FlushRenderCommandsIfTextureNeeded(SDL_Texture *texture)
{
SDL_Renderer *renderer = texture->renderer;
if (texture->last_command_generation == renderer->render_command_generation) {
/* the current command queue depends on this texture, flush the queue now before it changes */
return FlushRenderCommands(renderer);
}
return 0;
}
static SDL_INLINE int
FlushRenderCommandsIfNotBatching(SDL_Renderer *renderer)
{
return renderer->batching ? 0 : FlushRenderCommands(renderer);
}
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int
SDL_RenderFlush(SDL_Renderer * renderer)
{
return FlushRenderCommands(renderer);
}
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void *
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SDL_AllocateRenderVertices(SDL_Renderer *renderer, const size_t numbytes, const size_t alignment, size_t *offset)
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{
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const size_t needed = renderer->vertex_data_used + numbytes + alignment;
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size_t current_offset = renderer->vertex_data_used;
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size_t aligner = (alignment && ((current_offset & (alignment - 1)) != 0)) ? (alignment - (current_offset & (alignment - 1))) : 0;
size_t aligned = current_offset + aligner;
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if (renderer->vertex_data_allocation < needed) {
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const size_t current_allocation = renderer->vertex_data ? renderer->vertex_data_allocation : 1024;
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size_t newsize = current_allocation * 2;
void *ptr;
while (newsize < needed) {
newsize *= 2;
}
ptr = SDL_realloc(renderer->vertex_data, newsize);
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if (ptr == NULL) {
SDL_OutOfMemory();
return NULL;
}
renderer->vertex_data = ptr;
renderer->vertex_data_allocation = newsize;
}
if (offset) {
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*offset = aligned;
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}
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renderer->vertex_data_used += aligner + numbytes;
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return ((Uint8 *) renderer->vertex_data) + aligned;
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}
static SDL_RenderCommand *
AllocateRenderCommand(SDL_Renderer *renderer)
{
SDL_RenderCommand *retval = NULL;
/* !!! FIXME: are there threading limitations in SDL's render API? If not, we need to mutex this. */
retval = renderer->render_commands_pool;
if (retval != NULL) {
renderer->render_commands_pool = retval->next;
retval->next = NULL;
} else {
retval = SDL_calloc(1, sizeof (*retval));
if (!retval) {
SDL_OutOfMemory();
return NULL;
}
}
SDL_assert((renderer->render_commands == NULL) == (renderer->render_commands_tail == NULL));
if (renderer->render_commands_tail != NULL) {
renderer->render_commands_tail->next = retval;
} else {
renderer->render_commands = retval;
}
renderer->render_commands_tail = retval;
return retval;
}
static int
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QueueCmdSetViewport(SDL_Renderer *renderer)
{
int retval = 0;
if (!renderer->viewport_queued || (SDL_memcmp(&renderer->viewport, &renderer->last_queued_viewport, sizeof (SDL_Rect)) != 0)) {
SDL_RenderCommand *cmd = AllocateRenderCommand(renderer);
retval = -1;
if (cmd != NULL) {
cmd->command = SDL_RENDERCMD_SETVIEWPORT;
cmd->data.viewport.first = 0; /* render backend will fill this in. */
SDL_memcpy(&cmd->data.viewport.rect, &renderer->viewport, sizeof (renderer->viewport));
retval = renderer->QueueSetViewport(renderer, cmd);
if (retval < 0) {
cmd->command = SDL_RENDERCMD_NO_OP;
} else {
SDL_memcpy(&renderer->last_queued_viewport, &renderer->viewport, sizeof (SDL_Rect));
renderer->viewport_queued = SDL_TRUE;
}
}
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}
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return retval;
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}
static int
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QueueCmdSetClipRect(SDL_Renderer *renderer)
{
int retval = 0;
if ((!renderer->cliprect_queued) ||
(renderer->clipping_enabled != renderer->last_queued_cliprect_enabled) ||
(SDL_memcmp(&renderer->clip_rect, &renderer->last_queued_cliprect, sizeof (SDL_Rect)) != 0)) {
SDL_RenderCommand *cmd = AllocateRenderCommand(renderer);
if (cmd == NULL) {
retval = -1;
} else {
cmd->command = SDL_RENDERCMD_SETCLIPRECT;
cmd->data.cliprect.enabled = renderer->clipping_enabled;
SDL_memcpy(&cmd->data.cliprect.rect, &renderer->clip_rect, sizeof (cmd->data.cliprect.rect));
SDL_memcpy(&renderer->last_queued_cliprect, &renderer->clip_rect, sizeof (SDL_Rect));
renderer->last_queued_cliprect_enabled = renderer->clipping_enabled;
renderer->cliprect_queued = SDL_TRUE;
}
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}
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return retval;
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}
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static int
QueueCmdSetDrawColor(SDL_Renderer *renderer, const Uint8 r, const Uint8 g, const Uint8 b, const Uint8 a)
{
const Uint32 color = ((a << 24) | (r << 16) | (g << 8) | b);
int retval = 0;
if (!renderer->color_queued || (color != renderer->last_queued_color)) {
SDL_RenderCommand *cmd = AllocateRenderCommand(renderer);
retval = -1;
if (cmd != NULL) {
cmd->command = SDL_RENDERCMD_SETDRAWCOLOR;
cmd->data.color.first = 0; /* render backend will fill this in. */
cmd->data.color.r = r;
cmd->data.color.g = g;
cmd->data.color.b = b;
cmd->data.color.a = a;
retval = renderer->QueueSetDrawColor(renderer, cmd);
if (retval < 0) {
cmd->command = SDL_RENDERCMD_NO_OP;
} else {
renderer->last_queued_color = color;
renderer->color_queued = SDL_TRUE;
}
}
}
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return retval;
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}
static int
QueueCmdClear(SDL_Renderer *renderer)
{
SDL_RenderCommand *cmd = AllocateRenderCommand(renderer);
if (cmd == NULL) {
return -1;
}
cmd->command = SDL_RENDERCMD_CLEAR;
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cmd->data.color.first = 0;
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cmd->data.color.r = renderer->r;
cmd->data.color.g = renderer->g;
cmd->data.color.b = renderer->b;
cmd->data.color.a = renderer->a;
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return 0;
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}
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static int
PrepQueueCmdDraw(SDL_Renderer *renderer, const Uint8 r, const Uint8 g, const Uint8 b, const Uint8 a)
{
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int retval = QueueCmdSetDrawColor(renderer, r, g, b, a);
/* Set the viewport and clip rect directly before draws, so the backends
* don't have to worry about that state not being valid at draw time. */
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if (retval == 0 && !renderer->viewport_queued) {
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retval = QueueCmdSetViewport(renderer);
}
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if (retval == 0 && !renderer->cliprect_queued) {
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retval = QueueCmdSetClipRect(renderer);
}
return retval;
}
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static SDL_RenderCommand *
PrepQueueCmdDrawSolid(SDL_Renderer *renderer, const SDL_RenderCommandType cmdtype)
{
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/* !!! FIXME: drop this draw if viewport w or h is zero. */
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SDL_RenderCommand *cmd = NULL;
if (PrepQueueCmdDraw(renderer, renderer->r, renderer->g, renderer->b, renderer->a) == 0) {
cmd = AllocateRenderCommand(renderer);
if (cmd != NULL) {
cmd->command = cmdtype;
cmd->data.draw.first = 0; /* render backend will fill this in. */
cmd->data.draw.count = 0; /* render backend will fill this in. */
cmd->data.draw.r = renderer->r;
cmd->data.draw.g = renderer->g;
cmd->data.draw.b = renderer->b;
cmd->data.draw.a = renderer->a;
cmd->data.draw.blend = renderer->blendMode;
cmd->data.draw.texture = NULL; /* no texture. */
}
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}
return cmd;
}
static int
QueueCmdDrawPoints(SDL_Renderer *renderer, const SDL_FPoint * points, const int count)
{
SDL_RenderCommand *cmd = PrepQueueCmdDrawSolid(renderer, SDL_RENDERCMD_DRAW_POINTS);
int retval = -1;
if (cmd != NULL) {
retval = renderer->QueueDrawPoints(renderer, cmd, points, count);
if (retval < 0) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
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return retval;
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}
static int
QueueCmdDrawLines(SDL_Renderer *renderer, const SDL_FPoint * points, const int count)
{
SDL_RenderCommand *cmd = PrepQueueCmdDrawSolid(renderer, SDL_RENDERCMD_DRAW_LINES);
int retval = -1;
if (cmd != NULL) {
retval = renderer->QueueDrawLines(renderer, cmd, points, count);
if (retval < 0) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
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return retval;
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}
static int
QueueCmdFillRects(SDL_Renderer *renderer, const SDL_FRect * rects, const int count)
{
SDL_RenderCommand *cmd = PrepQueueCmdDrawSolid(renderer, SDL_RENDERCMD_FILL_RECTS);
int retval = -1;
if (cmd != NULL) {
retval = renderer->QueueFillRects(renderer, cmd, rects, count);
if (retval < 0) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
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return retval;
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}
static SDL_RenderCommand *
PrepQueueCmdDrawTexture(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_RenderCommandType cmdtype)
{
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/* !!! FIXME: drop this draw if viewport w or h is zero. */
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SDL_RenderCommand *cmd = NULL;
if (PrepQueueCmdDraw(renderer, texture->r, texture->g, texture->b, texture->a) == 0) {
cmd = AllocateRenderCommand(renderer);
if (cmd != NULL) {
cmd->command = cmdtype;
cmd->data.draw.first = 0; /* render backend will fill this in. */
cmd->data.draw.count = 0; /* render backend will fill this in. */
cmd->data.draw.r = texture->r;
cmd->data.draw.g = texture->g;
cmd->data.draw.b = texture->b;
cmd->data.draw.a = texture->a;
cmd->data.draw.blend = texture->blendMode;
cmd->data.draw.texture = texture;
}
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}
return cmd;
}
static int
QueueCmdCopy(SDL_Renderer *renderer, SDL_Texture * texture, const SDL_Rect * srcrect, const SDL_FRect * dstrect)
{
SDL_RenderCommand *cmd = PrepQueueCmdDrawTexture(renderer, texture, SDL_RENDERCMD_COPY);
int retval = -1;
if (cmd != NULL) {
retval = renderer->QueueCopy(renderer, cmd, texture, srcrect, dstrect);
if (retval < 0) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
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return retval;
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}
static int
QueueCmdCopyEx(SDL_Renderer *renderer, SDL_Texture * texture,
const SDL_Rect * srcquad, const SDL_FRect * dstrect,
const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip)
{
SDL_RenderCommand *cmd = PrepQueueCmdDrawTexture(renderer, texture, SDL_RENDERCMD_COPY_EX);
int retval = -1;
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SDL_assert(renderer->QueueCopyEx != NULL); /* should have caught at higher level. */
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if (cmd != NULL) {
retval = renderer->QueueCopyEx(renderer, cmd, texture, srcquad, dstrect, angle, center, flip);
if (retval < 0) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
546
return retval;
547
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549
}
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576
static int UpdateLogicalSize(SDL_Renderer *renderer);
int
SDL_GetNumRenderDrivers(void)
{
#if !SDL_RENDER_DISABLED
return SDL_arraysize(render_drivers);
#else
return 0;
#endif
}
int
SDL_GetRenderDriverInfo(int index, SDL_RendererInfo * info)
{
#if !SDL_RENDER_DISABLED
if (index < 0 || index >= SDL_GetNumRenderDrivers()) {
return SDL_SetError("index must be in the range of 0 - %d",
SDL_GetNumRenderDrivers() - 1);
}
*info = render_drivers[index]->info;
return 0;
#else
return SDL_SetError("SDL not built with rendering support");
#endif
}
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579
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582
583
584
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586
static void GetWindowViewportValues(SDL_Renderer *renderer, int *logical_w, int *logical_h, SDL_Rect *viewport, SDL_FPoint *scale)
{
SDL_LockMutex(renderer->target_mutex);
*logical_w = renderer->target ? renderer->logical_w_backup : renderer->logical_w;
*logical_h = renderer->target ? renderer->logical_h_backup : renderer->logical_h;
*viewport = renderer->target ? renderer->viewport_backup : renderer->viewport;
*scale = renderer->target ? renderer->scale_backup : renderer->scale;
SDL_UnlockMutex(renderer->target_mutex);
}
587
static int SDLCALL
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627
SDL_RendererEventWatch(void *userdata, SDL_Event *event)
{
SDL_Renderer *renderer = (SDL_Renderer *)userdata;
if (event->type == SDL_WINDOWEVENT) {
SDL_Window *window = SDL_GetWindowFromID(event->window.windowID);
if (window == renderer->window) {
if (renderer->WindowEvent) {
renderer->WindowEvent(renderer, &event->window);
}
if (event->window.event == SDL_WINDOWEVENT_SIZE_CHANGED) {
/* Make sure we're operating on the default render target */
SDL_Texture *saved_target = SDL_GetRenderTarget(renderer);
if (saved_target) {
SDL_SetRenderTarget(renderer, NULL);
}
if (renderer->logical_w) {
UpdateLogicalSize(renderer);
} else {
/* Window was resized, reset viewport */
int w, h;
if (renderer->GetOutputSize) {
renderer->GetOutputSize(renderer, &w, &h);
} else {
SDL_GetWindowSize(renderer->window, &w, &h);
}
if (renderer->target) {
renderer->viewport_backup.x = 0;
renderer->viewport_backup.y = 0;
renderer->viewport_backup.w = w;
renderer->viewport_backup.h = h;
} else {
renderer->viewport.x = 0;
renderer->viewport.y = 0;
renderer->viewport.w = w;
renderer->viewport.h = h;
628
QueueCmdSetViewport(renderer);
629
FlushRenderCommandsIfNotBatching(renderer);
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}
}
if (saved_target) {
SDL_SetRenderTarget(renderer, saved_target);
}
} else if (event->window.event == SDL_WINDOWEVENT_HIDDEN) {
renderer->hidden = SDL_TRUE;
} else if (event->window.event == SDL_WINDOWEVENT_SHOWN) {
if (!(SDL_GetWindowFlags(window) & SDL_WINDOW_MINIMIZED)) {
renderer->hidden = SDL_FALSE;
}
} else if (event->window.event == SDL_WINDOWEVENT_MINIMIZED) {
renderer->hidden = SDL_TRUE;
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645
} else if (event->window.event == SDL_WINDOWEVENT_RESTORED ||
event->window.event == SDL_WINDOWEVENT_MAXIMIZED) {
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647
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652
if (!(SDL_GetWindowFlags(window) & SDL_WINDOW_HIDDEN)) {
renderer->hidden = SDL_FALSE;
}
}
}
} else if (event->type == SDL_MOUSEMOTION) {
SDL_Window *window = SDL_GetWindowFromID(event->motion.windowID);
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if (window == renderer->window) {
int logical_w, logical_h;
SDL_Rect viewport;
SDL_FPoint scale;
GetWindowViewportValues(renderer, &logical_w, &logical_h, &viewport, &scale);
if (logical_w) {
event->motion.x -= (int)(viewport.x * renderer->dpi_scale.x);
event->motion.y -= (int)(viewport.y * renderer->dpi_scale.y);
event->motion.x = (int)(event->motion.x / (scale.x * renderer->dpi_scale.x));
event->motion.y = (int)(event->motion.y / (scale.y * renderer->dpi_scale.y));
if (event->motion.xrel > 0) {
event->motion.xrel = SDL_max(1, (int)(event->motion.xrel / (scale.x * renderer->dpi_scale.x)));
} else if (event->motion.xrel < 0) {
event->motion.xrel = SDL_min(-1, (int)(event->motion.xrel / (scale.x * renderer->dpi_scale.x)));
}
if (event->motion.yrel > 0) {
event->motion.yrel = SDL_max(1, (int)(event->motion.yrel / (scale.y * renderer->dpi_scale.y)));
} else if (event->motion.yrel < 0) {
event->motion.yrel = SDL_min(-1, (int)(event->motion.yrel / (scale.y * renderer->dpi_scale.y)));
}
673
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675
676
677
}
}
} else if (event->type == SDL_MOUSEBUTTONDOWN ||
event->type == SDL_MOUSEBUTTONUP) {
SDL_Window *window = SDL_GetWindowFromID(event->button.windowID);
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682
683
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687
688
if (window == renderer->window) {
int logical_w, logical_h;
SDL_Rect viewport;
SDL_FPoint scale;
GetWindowViewportValues(renderer, &logical_w, &logical_h, &viewport, &scale);
if (logical_w) {
event->button.x -= (int)(viewport.x * renderer->dpi_scale.x);
event->button.y -= (int)(viewport.y * renderer->dpi_scale.y);
event->button.x = (int)(event->button.x / (scale.x * renderer->dpi_scale.x));
event->button.y = (int)(event->button.y / (scale.y * renderer->dpi_scale.y));
}
689
}
690
691
692
} else if (event->type == SDL_FINGERDOWN ||
event->type == SDL_FINGERUP ||
event->type == SDL_FINGERMOTION) {
693
694
695
696
697
int logical_w, logical_h;
SDL_Rect viewport;
SDL_FPoint scale;
GetWindowViewportValues(renderer, &logical_w, &logical_h, &viewport, &scale);
if (logical_w) {
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700
701
702
703
704
int w, h;
if (renderer->GetOutputSize) {
renderer->GetOutputSize(renderer, &w, &h);
} else {
SDL_GetWindowSize(renderer->window, &w, &h);
}
705
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707
708
event->tfinger.x *= (w - 1);
event->tfinger.y *= (h - 1);
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712
event->tfinger.x -= (viewport.x * renderer->dpi_scale.x);
event->tfinger.y -= (viewport.y * renderer->dpi_scale.y);
event->tfinger.x = (event->tfinger.x / (scale.x * renderer->dpi_scale.x));
event->tfinger.y = (event->tfinger.y / (scale.y * renderer->dpi_scale.y));
713
714
715
if (logical_w > 1) {
event->tfinger.x = event->tfinger.x / (logical_w - 1);
716
717
718
} else {
event->tfinger.x = 0.5f;
}
719
720
if (logical_h > 1) {
event->tfinger.y = event->tfinger.y / (logical_h - 1);
721
722
723
724
} else {
event->tfinger.y = 0.5f;
}
}
725
}
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
return 0;
}
int
SDL_CreateWindowAndRenderer(int width, int height, Uint32 window_flags,
SDL_Window **window, SDL_Renderer **renderer)
{
*window = SDL_CreateWindow(NULL, SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,
width, height, window_flags);
if (!*window) {
*renderer = NULL;
return -1;
}
*renderer = SDL_CreateRenderer(*window, -1, 0);
if (!*renderer) {
return -1;
}
return 0;
}
750
751
752
753
754
static SDL_INLINE
void VerifyDrawQueueFunctions(const SDL_Renderer *renderer)
{
/* all of these functions are required to be implemented, even as no-ops, so we don't
have to check that they aren't NULL over and over. */
755
756
SDL_assert(renderer->QueueSetViewport != NULL);
SDL_assert(renderer->QueueSetDrawColor != NULL);
757
758
759
760
761
762
763
SDL_assert(renderer->QueueDrawPoints != NULL);
SDL_assert(renderer->QueueDrawLines != NULL);
SDL_assert(renderer->QueueFillRects != NULL);
SDL_assert(renderer->QueueCopy != NULL);
SDL_assert(renderer->RunCommandQueue != NULL);
}
764
765
766
767
768
769
SDL_Renderer *
SDL_CreateRenderer(SDL_Window * window, int index, Uint32 flags)
{
#if !SDL_RENDER_DISABLED
SDL_Renderer *renderer = NULL;
int n = SDL_GetNumRenderDrivers();
770
SDL_bool batching = SDL_TRUE;
771
772
const char *hint;
773
774
775
776
#if defined(__ANDROID__)
Android_ActivityMutex_Lock_Running();
#endif
777
778
if (!window) {
SDL_SetError("Invalid window");
779
goto error;
780
781
782
783
}
if (SDL_GetRenderer(window)) {
SDL_SetError("Renderer already associated with window");
784
goto error;
785
786
}
787
788
if (SDL_GetHint(SDL_HINT_RENDER_VSYNC)) {
if (SDL_GetHintBoolean(SDL_HINT_RENDER_VSYNC, SDL_TRUE)) {
789
flags |= SDL_RENDERER_PRESENTVSYNC;
790
791
} else {
flags &= ~SDL_RENDERER_PRESENTVSYNC;
792
793
794
795
796
797
798
799
800
801
802
803
}
}
if (index < 0) {
hint = SDL_GetHint(SDL_HINT_RENDER_DRIVER);
if (hint) {
for (index = 0; index < n; ++index) {
const SDL_RenderDriver *driver = render_drivers[index];
if (SDL_strcasecmp(hint, driver->info.name) == 0) {
/* Create a new renderer instance */
renderer = driver->CreateRenderer(window, flags);
804
805
806
if (renderer) {
batching = SDL_FALSE;
}
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
break;
}
}
}
if (!renderer) {
for (index = 0; index < n; ++index) {
const SDL_RenderDriver *driver = render_drivers[index];
if ((driver->info.flags & flags) == flags) {
/* Create a new renderer instance */
renderer = driver->CreateRenderer(window, flags);
if (renderer) {
/* Yay, we got one! */
break;
}
}
}
}
if (index == n) {
SDL_SetError("Couldn't find matching render driver");
828
goto error;
829
830
831
832
833
}
} else {
if (index >= SDL_GetNumRenderDrivers()) {
SDL_SetError("index must be -1 or in the range of 0 - %d",
SDL_GetNumRenderDrivers() - 1);
834
goto error;
835
836
837
}
/* Create a new renderer instance */
renderer = render_drivers[index]->CreateRenderer(window, flags);
838
batching = SDL_FALSE;
839
840
}
841
842
843
if (!renderer) {
goto error;
}
844
845
VerifyDrawQueueFunctions(renderer);
846
847
848
849
850
851
852
/* let app/user override batching decisions. */
if (renderer->always_batch) {
batching = SDL_TRUE;
} else if (SDL_GetHint(SDL_HINT_RENDER_BATCHING)) {
batching = SDL_GetHintBoolean(SDL_HINT_RENDER_BATCHING, SDL_TRUE);
}
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
renderer->batching = batching;
renderer->magic = &renderer_magic;
renderer->window = window;
renderer->target_mutex = SDL_CreateMutex();
renderer->scale.x = 1.0f;
renderer->scale.y = 1.0f;
renderer->dpi_scale.x = 1.0f;
renderer->dpi_scale.y = 1.0f;
/* new textures start at zero, so we start at 1 so first render doesn't flush by accident. */
renderer->render_command_generation = 1;
if (window && renderer->GetOutputSize) {
int window_w, window_h;
int output_w, output_h;
if (renderer->GetOutputSize(renderer, &output_w, &output_h) == 0) {
SDL_GetWindowSize(renderer->window, &window_w, &window_h);
renderer->dpi_scale.x = (float)window_w / output_w;
renderer->dpi_scale.y = (float)window_h / output_h;
873
}
874
875
876
877
878
879
880
}
if (SDL_GetWindowFlags(window) & (SDL_WINDOW_HIDDEN|SDL_WINDOW_MINIMIZED)) {
renderer->hidden = SDL_TRUE;
} else {
renderer->hidden = SDL_FALSE;
}
881
882
SDL_SetWindowData(window, SDL_WINDOWRENDERDATA, renderer);
883
884
SDL_RenderSetViewport(renderer, NULL);
885
886
887
888
889
SDL_AddEventWatch(SDL_RendererEventWatch, renderer);
SDL_LogInfo(SDL_LOG_CATEGORY_RENDER,
"Created renderer: %s", renderer->info.name);
890
891
892
893
#if defined(__ANDROID__)
Android_ActivityMutex_Unlock();
#endif
894
return renderer;
895
896
error:
897
898
899
900
#if defined(__ANDROID__)
Android_ActivityMutex_Unlock();
#endif
901
902
return NULL;
903
904
905
906
907
908
909
910
911
#else
SDL_SetError("SDL not built with rendering support");
return NULL;
#endif
}
SDL_Renderer *
SDL_CreateSoftwareRenderer(SDL_Surface * surface)
{
912
#if !SDL_RENDER_DISABLED && SDL_VIDEO_RENDER_SW
913
914
915
916
917
SDL_Renderer *renderer;
renderer = SW_CreateRendererForSurface(surface);
if (renderer) {
918
VerifyDrawQueueFunctions(renderer);
919
renderer->magic = &renderer_magic;
920
renderer->target_mutex = SDL_CreateMutex();
921
922
923
renderer->scale.x = 1.0f;
renderer->scale.y = 1.0f;
924
925
926
/* new textures start at zero, so we start at 1 so first render doesn't flush by accident. */
renderer->render_command_generation = 1;
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
SDL_RenderSetViewport(renderer, NULL);
}
return renderer;
#else
SDL_SetError("SDL not built with rendering support");
return NULL;
#endif /* !SDL_RENDER_DISABLED */
}
SDL_Renderer *
SDL_GetRenderer(SDL_Window * window)
{
return (SDL_Renderer *)SDL_GetWindowData(window, SDL_WINDOWRENDERDATA);
}
int
SDL_GetRendererInfo(SDL_Renderer * renderer, SDL_RendererInfo * info)
{
CHECK_RENDERER_MAGIC(renderer, -1);
*info = renderer->info;
return 0;
}
int
SDL_GetRendererOutputSize(SDL_Renderer * renderer, int *w, int *h)
{
CHECK_RENDERER_MAGIC(renderer, -1);
if (renderer->target) {
return SDL_QueryTexture(renderer->target, NULL, NULL, w, h);
} else if (renderer->GetOutputSize) {
return renderer->GetOutputSize(renderer, w, h);
} else if (renderer->window) {
SDL_GetWindowSize(renderer->window, w, h);
return 0;
} else {
SDL_assert(0 && "This should never happen");
return SDL_SetError("Renderer doesn't support querying output size");
}
}
969
970
971
972
973
974
975
976
977
978
static SDL_bool
IsSupportedBlendMode(SDL_Renderer * renderer, SDL_BlendMode blendMode)
{
switch (blendMode)
{
/* These are required to be supported by all renderers */
case SDL_BLENDMODE_NONE:
case SDL_BLENDMODE_BLEND:
case SDL_BLENDMODE_ADD:
case SDL_BLENDMODE_MOD:
979
case SDL_BLENDMODE_MUL:
980
981
982
983
984
985
986
return SDL_TRUE;
default:
return renderer->SupportsBlendMode && renderer->SupportsBlendMode(renderer, blendMode);
}
}
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
static SDL_bool
IsSupportedFormat(SDL_Renderer * renderer, Uint32 format)
{
Uint32 i;
for (i = 0; i < renderer->info.num_texture_formats; ++i) {
if (renderer->info.texture_formats[i] == format) {
return SDL_TRUE;
}
}
return SDL_FALSE;
}
static Uint32