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SDL_render.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
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_sysrender.h"
#include "SDL_render_debug_font.h"
#include "software/SDL_render_sw_c.h"
#include "../video/SDL_pixels_c.h"
#include "../video/SDL_video_c.h"
#ifdef SDL_PLATFORM_ANDROID
#include "../core/android/SDL_android.h"
#include "../video/android/SDL_androidevents.h"
#endif
/* as a courtesy to iOS apps, we don't try to draw when in the background, as
that will crash the app. However, these apps _should_ have used
SDL_AddEventWatch to catch SDL_EVENT_WILL_ENTER_BACKGROUND events and stopped
drawing themselves. Other platforms still draw, as the compositor can use it,
and more importantly: drawing to render targets isn't lost. But I still think
this should probably be removed at some point in the future. --ryan. */
#if defined(SDL_PLATFORM_IOS) || defined(SDL_PLATFORM_TVOS) || defined(SDL_PLATFORM_ANDROID)
#define DONT_DRAW_WHILE_HIDDEN 1
#else
#define DONT_DRAW_WHILE_HIDDEN 0
#endif
#define SDL_PROP_WINDOW_RENDERER_POINTER "SDL.internal.window.renderer"
#define SDL_PROP_TEXTURE_PARENT_POINTER "SDL.internal.texture.parent"
#define CHECK_RENDERER_MAGIC_BUT_NOT_DESTROYED_FLAG(renderer, result) \
if (!SDL_ObjectValid(renderer, SDL_OBJECT_TYPE_RENDERER)) { \
SDL_InvalidParamError("renderer"); \
return result; \
}
#define CHECK_RENDERER_MAGIC(renderer, result) \
CHECK_RENDERER_MAGIC_BUT_NOT_DESTROYED_FLAG(renderer, result); \
if ((renderer)->destroyed) { \
SDL_SetError("Renderer's window has been destroyed, can't use further"); \
return result; \
}
#define CHECK_TEXTURE_MAGIC(texture, result) \
if (!SDL_ObjectValid(texture, SDL_OBJECT_TYPE_TEXTURE)) { \
SDL_InvalidParamError("texture"); \
return result; \
}
// 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_BLEND_PREMULTIPLIED_FULL \
SDL_COMPOSE_BLENDMODE(SDL_BLENDFACTOR_ONE, 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_ADD_PREMULTIPLIED_FULL \
SDL_COMPOSE_BLENDMODE(SDL_BLENDFACTOR_ONE, 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)
#define SDL_BLENDMODE_MUL_FULL \
SDL_COMPOSE_BLENDMODE(SDL_BLENDFACTOR_DST_COLOR, SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA, SDL_BLENDOPERATION_ADD, \
SDL_BLENDFACTOR_ZERO, SDL_BLENDFACTOR_ONE, SDL_BLENDOPERATION_ADD)
#ifndef SDL_RENDER_DISABLED
static const SDL_RenderDriver *render_drivers[] = {
#ifdef SDL_VIDEO_RENDER_D3D11
&D3D11_RenderDriver,
#endif
#ifdef SDL_VIDEO_RENDER_D3D12
&D3D12_RenderDriver,
#endif
#ifdef SDL_VIDEO_RENDER_D3D
&D3D_RenderDriver,
#endif
#ifdef SDL_VIDEO_RENDER_METAL
&METAL_RenderDriver,
#endif
#ifdef SDL_VIDEO_RENDER_OGL
&GL_RenderDriver,
#endif
#ifdef SDL_VIDEO_RENDER_OGL_ES2
&GLES2_RenderDriver,
#endif
#ifdef SDL_VIDEO_RENDER_PS2
&PS2_RenderDriver,
#endif
#ifdef SDL_VIDEO_RENDER_PSP
&PSP_RenderDriver,
#endif
#ifdef SDL_VIDEO_RENDER_VITA_GXM
&VITA_GXM_RenderDriver,
#endif
#ifdef SDL_VIDEO_RENDER_VULKAN
&VULKAN_RenderDriver,
#endif
#ifdef SDL_VIDEO_RENDER_GPU
&GPU_RenderDriver,
#endif
#ifdef SDL_VIDEO_RENDER_SW
&SW_RenderDriver,
#endif
NULL
};
#endif // !SDL_RENDER_DISABLED
static SDL_Renderer *SDL_renderers;
static const int rect_index_order[] = { 0, 1, 2, 0, 2, 3 };
void SDL_QuitRender(void)
{
while (SDL_renderers) {
SDL_DestroyRenderer(SDL_renderers);
}
}
bool SDL_AddSupportedTextureFormat(SDL_Renderer *renderer, SDL_PixelFormat format)
{
SDL_PixelFormat *texture_formats = (SDL_PixelFormat *)SDL_realloc((void *)renderer->texture_formats, (renderer->num_texture_formats + 2) * sizeof(SDL_PixelFormat));
if (!texture_formats) {
return false;
}
texture_formats[renderer->num_texture_formats++] = format;
texture_formats[renderer->num_texture_formats] = SDL_PIXELFORMAT_UNKNOWN;
renderer->texture_formats = texture_formats;
SDL_SetPointerProperty(SDL_GetRendererProperties(renderer), SDL_PROP_RENDERER_TEXTURE_FORMATS_POINTER, texture_formats);
return true;
}
void SDL_SetupRendererColorspace(SDL_Renderer *renderer, SDL_PropertiesID props)
{
renderer->output_colorspace = (SDL_Colorspace)SDL_GetNumberProperty(props, SDL_PROP_RENDERER_CREATE_OUTPUT_COLORSPACE_NUMBER, SDL_COLORSPACE_SRGB);
}
bool SDL_RenderingLinearSpace(SDL_Renderer *renderer)
{
SDL_Colorspace colorspace;
if (renderer->target) {
colorspace = renderer->target->colorspace;
} else {
colorspace = renderer->output_colorspace;
}
if (colorspace == SDL_COLORSPACE_SRGB_LINEAR) {
return true;
}
return false;
}
void SDL_ConvertToLinear(SDL_FColor *color)
{
color->r = SDL_sRGBtoLinear(color->r);
color->g = SDL_sRGBtoLinear(color->g);
color->b = SDL_sRGBtoLinear(color->b);
}
void SDL_ConvertFromLinear(SDL_FColor *color)
{
color->r = SDL_sRGBfromLinear(color->r);
color->g = SDL_sRGBfromLinear(color->g);
color->b = SDL_sRGBfromLinear(color->b);
}
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, color_scale=%g)", i++,
(unsigned int) cmd->data.color.first,
(int) cmd->data.color.color.r, (int) cmd->data.color.color.g,
(int) cmd->data.color.color.b, (int) cmd->data.color.color.a, cmd->data.color.color_scale);
break;
case SDL_RENDERCMD_CLEAR:
SDL_Log(" %u. clear (first=%u, r=%d, g=%d, b=%d, a=%d, color_scale=%g)", i++,
(unsigned int) cmd->data.color.first,
(int) cmd->data.color.color.r, (int) cmd->data.color.color.g,
(int) cmd->data.color.color.b, (int) cmd->data.color.color.a, cmd->data.color.color_scale);
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, color_scale=%g)", i++,
(unsigned int) cmd->data.draw.first,
(unsigned int) cmd->data.draw.count,
(int) cmd->data.draw.color.r, (int) cmd->data.draw.color.g,
(int) cmd->data.draw.color.b, (int) cmd->data.draw.color.a,
(int) cmd->data.draw.blend, cmd->data.draw.color_scale);
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, color_scale=%g)", i++,
(unsigned int) cmd->data.draw.first,
(unsigned int) cmd->data.draw.count,
(int) cmd->data.draw.color.r, (int) cmd->data.draw.color.g,
(int) cmd->data.draw.color.b, (int) cmd->data.draw.color.a,
(int) cmd->data.draw.blend, cmd->data.draw.color_scale);
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, color_scale=%g)", i++,
(unsigned int) cmd->data.draw.first,
(unsigned int) cmd->data.draw.count,
(int) cmd->data.draw.color.r, (int) cmd->data.draw.color.g,
(int) cmd->data.draw.color.b, (int) cmd->data.draw.color.a,
(int) cmd->data.draw.blend, cmd->data.draw.color_scale);
break;
case SDL_RENDERCMD_COPY:
SDL_Log(" %u. copy (first=%u, count=%u, r=%d, g=%d, b=%d, a=%d, blend=%d, color_scale=%g, tex=%p)", i++,
(unsigned int) cmd->data.draw.first,
(unsigned int) cmd->data.draw.count,
(int) cmd->data.draw.color.r, (int) cmd->data.draw.color.g,
(int) cmd->data.draw.color.b, (int) cmd->data.draw.color.a,
(int) cmd->data.draw.blend, cmd->data.draw.color_scale, 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, color_scale=%g, tex=%p)", i++,
(unsigned int) cmd->data.draw.first,
(unsigned int) cmd->data.draw.count,
(int) cmd->data.draw.color.r, (int) cmd->data.draw.color.g,
(int) cmd->data.draw.color.b, (int) cmd->data.draw.color.a,
(int) cmd->data.draw.blend, cmd->data.draw.color_scale, cmd->data.draw.texture);
break;
case SDL_RENDERCMD_GEOMETRY:
SDL_Log(" %u. geometry (first=%u, count=%u, r=%d, g=%d, b=%d, a=%d, blend=%d, color_scale=%g, tex=%p)", i++,
(unsigned int) cmd->data.draw.first,
(unsigned int) cmd->data.draw.count,
(int) cmd->data.draw.color.r, (int) cmd->data.draw.color.g,
(int) cmd->data.draw.color.b, (int) cmd->data.draw.color.a,
(int) cmd->data.draw.blend, cmd->data.draw.color_scale, cmd->data.draw.texture);
break;
}
cmd = cmd->next;
}
#endif
}
static bool FlushRenderCommands(SDL_Renderer *renderer)
{
bool result;
SDL_assert((renderer->render_commands == NULL) == (renderer->render_commands_tail == NULL));
if (!renderer->render_commands) { // nothing to do!
SDL_assert(renderer->vertex_data_used == 0);
return true;
}
DebugLogRenderCommands(renderer->render_commands);
result = 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) {
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++;
renderer->color_queued = false;
renderer->viewport_queued = false;
renderer->cliprect_queued = false;
return result;
}
static bool 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 true;
}
bool SDL_FlushRenderer(SDL_Renderer *renderer)
{
if (!FlushRenderCommands(renderer)) {
return false;
}
renderer->InvalidateCachedState(renderer);
return true;
}
void *SDL_AllocateRenderVertices(SDL_Renderer *renderer, size_t numbytes, size_t alignment, size_t *offset)
{
const size_t needed = renderer->vertex_data_used + numbytes + alignment;
const size_t current_offset = renderer->vertex_data_used;
const size_t aligner = (alignment && ((current_offset & (alignment - 1)) != 0)) ? (alignment - (current_offset & (alignment - 1))) : 0;
const size_t aligned = current_offset + aligner;
if (renderer->vertex_data_allocation < needed) {
const size_t current_allocation = renderer->vertex_data ? renderer->vertex_data_allocation : 1024;
size_t newsize = current_allocation * 2;
void *ptr;
while (newsize < needed) {
newsize *= 2;
}
ptr = SDL_realloc(renderer->vertex_data, newsize);
if (!ptr) {
return NULL;
}
renderer->vertex_data = ptr;
renderer->vertex_data_allocation = newsize;
}
if (offset) {
*offset = aligned;
}
renderer->vertex_data_used += aligner + numbytes;
return ((Uint8 *)renderer->vertex_data) + aligned;
}
static SDL_RenderCommand *AllocateRenderCommand(SDL_Renderer *renderer)
{
SDL_RenderCommand *result = NULL;
result = renderer->render_commands_pool;
if (result) {
renderer->render_commands_pool = result->next;
result->next = NULL;
} else {
result = (SDL_RenderCommand *)SDL_calloc(1, sizeof(*result));
if (!result) {
return NULL;
}
}
SDL_assert((renderer->render_commands == NULL) == (renderer->render_commands_tail == NULL));
if (renderer->render_commands_tail) {
renderer->render_commands_tail->next = result;
} else {
renderer->render_commands = result;
}
renderer->render_commands_tail = result;
return result;
}
static void UpdatePixelViewport(SDL_Renderer *renderer, SDL_RenderViewState *view)
{
view->pixel_viewport.x = (int)SDL_floorf((view->viewport.x * view->current_scale.x) + view->logical_offset.x);
view->pixel_viewport.y = (int)SDL_floorf((view->viewport.y * view->current_scale.y) + view->logical_offset.y);
if (view->viewport.w >= 0) {
view->pixel_viewport.w = (int)SDL_ceilf(view->viewport.w * view->current_scale.x);
} else {
view->pixel_viewport.w = view->pixel_w;
}
if (view->viewport.h >= 0) {
view->pixel_viewport.h = (int)SDL_ceilf(view->viewport.h * view->current_scale.y);
} else {
view->pixel_viewport.h = view->pixel_h;
}
}
static bool QueueCmdSetViewport(SDL_Renderer *renderer)
{
bool result = true;
SDL_Rect viewport = renderer->view->pixel_viewport;
if (!renderer->viewport_queued ||
SDL_memcmp(&viewport, &renderer->last_queued_viewport, sizeof(viewport)) != 0) {
SDL_RenderCommand *cmd = AllocateRenderCommand(renderer);
if (cmd) {
cmd->command = SDL_RENDERCMD_SETVIEWPORT;
cmd->data.viewport.first = 0; // render backend will fill this in.
SDL_copyp(&cmd->data.viewport.rect, &viewport);
result = renderer->QueueSetViewport(renderer, cmd);
if (!result) {
cmd->command = SDL_RENDERCMD_NO_OP;
} else {
SDL_copyp(&renderer->last_queued_viewport, &viewport);
renderer->viewport_queued = true;
}
} else {
result = false;
}
}
return result;
}
static void UpdatePixelClipRect(SDL_Renderer *renderer, SDL_RenderViewState *view)
{
const float scale_x = view->current_scale.x;
const float scale_y = view->current_scale.y;
view->pixel_clip_rect.x = (int)SDL_floorf((view->clip_rect.x * scale_x) + view->logical_offset.x);
view->pixel_clip_rect.y = (int)SDL_floorf((view->clip_rect.y * scale_y) + view->logical_offset.y);
view->pixel_clip_rect.w = (int)SDL_ceilf(view->clip_rect.w * scale_x);
view->pixel_clip_rect.h = (int)SDL_ceilf(view->clip_rect.h * scale_y);
}
static bool QueueCmdSetClipRect(SDL_Renderer *renderer)
{
bool result = true;
SDL_Rect clip_rect = renderer->view->pixel_clip_rect;
if (!renderer->cliprect_queued ||
renderer->view->clipping_enabled != renderer->last_queued_cliprect_enabled ||
SDL_memcmp(&clip_rect, &renderer->last_queued_cliprect, sizeof(clip_rect)) != 0) {
SDL_RenderCommand *cmd = AllocateRenderCommand(renderer);
if (cmd) {
cmd->command = SDL_RENDERCMD_SETCLIPRECT;
cmd->data.cliprect.enabled = renderer->view->clipping_enabled;
SDL_copyp(&cmd->data.cliprect.rect, &clip_rect);
SDL_copyp(&renderer->last_queued_cliprect, &clip_rect);
renderer->last_queued_cliprect_enabled = renderer->view->clipping_enabled;
renderer->cliprect_queued = true;
} else {
result = false;
}
}
return result;
}
static bool QueueCmdSetDrawColor(SDL_Renderer *renderer, SDL_FColor *color)
{
bool result = true;
if (!renderer->color_queued ||
color->r != renderer->last_queued_color.r ||
color->g != renderer->last_queued_color.g ||
color->b != renderer->last_queued_color.b ||
color->a != renderer->last_queued_color.a) {
SDL_RenderCommand *cmd = AllocateRenderCommand(renderer);
result = false;
if (cmd) {
cmd->command = SDL_RENDERCMD_SETDRAWCOLOR;
cmd->data.color.first = 0; // render backend will fill this in.
cmd->data.color.color_scale = renderer->color_scale;
cmd->data.color.color = *color;
result = renderer->QueueSetDrawColor(renderer, cmd);
if (!result) {
cmd->command = SDL_RENDERCMD_NO_OP;
} else {
renderer->last_queued_color = *color;
renderer->color_queued = true;
}
}
}
return result;
}
static bool QueueCmdClear(SDL_Renderer *renderer)
{
SDL_RenderCommand *cmd = AllocateRenderCommand(renderer);
if (!cmd) {
return false;
}
cmd->command = SDL_RENDERCMD_CLEAR;
cmd->data.color.first = 0;
cmd->data.color.color_scale = renderer->color_scale;
cmd->data.color.color = renderer->color;
return true;
}
static SDL_RenderCommand *PrepQueueCmdDraw(SDL_Renderer *renderer, const SDL_RenderCommandType cmdtype, SDL_Texture *texture)
{
SDL_RenderCommand *cmd = NULL;
bool result = true;
SDL_FColor *color;
SDL_BlendMode blendMode;
if (texture) {
color = &texture->color;
blendMode = texture->blendMode;
} else {
color = &renderer->color;
blendMode = renderer->blendMode;
}
if (cmdtype != SDL_RENDERCMD_GEOMETRY) {
result = QueueCmdSetDrawColor(renderer, color);
}
/* 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. */
if (result && !renderer->viewport_queued) {
result = QueueCmdSetViewport(renderer);
}
if (result && !renderer->cliprect_queued) {
result = QueueCmdSetClipRect(renderer);
}
if (result) {
cmd = AllocateRenderCommand(renderer);
if (cmd) {
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.color_scale = renderer->color_scale;
cmd->data.draw.color = *color;
cmd->data.draw.blend = blendMode;
cmd->data.draw.texture = texture;
cmd->data.draw.texture_address_mode = SDL_TEXTURE_ADDRESS_CLAMP;
}
}
return cmd;
}
static bool QueueCmdDrawPoints(SDL_Renderer *renderer, const SDL_FPoint *points, const int count)
{
SDL_RenderCommand *cmd = PrepQueueCmdDraw(renderer, SDL_RENDERCMD_DRAW_POINTS, NULL);
bool result = false;
if (cmd) {
result = renderer->QueueDrawPoints(renderer, cmd, points, count);
if (!result) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
return result;
}
static bool QueueCmdDrawLines(SDL_Renderer *renderer, const SDL_FPoint *points, const int count)
{
SDL_RenderCommand *cmd = PrepQueueCmdDraw(renderer, SDL_RENDERCMD_DRAW_LINES, NULL);
bool result = false;
if (cmd) {
result = renderer->QueueDrawLines(renderer, cmd, points, count);
if (!result) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
return result;
}
static bool QueueCmdFillRects(SDL_Renderer *renderer, const SDL_FRect *rects, const int count)
{
SDL_RenderCommand *cmd;
bool result = false;
const int use_rendergeometry = (!renderer->QueueFillRects);
cmd = PrepQueueCmdDraw(renderer, (use_rendergeometry ? SDL_RENDERCMD_GEOMETRY : SDL_RENDERCMD_FILL_RECTS), NULL);
if (cmd) {
if (use_rendergeometry) {
bool isstack1;
bool isstack2;
float *xy = SDL_small_alloc(float, 4 * 2 * count, &isstack1);
int *indices = SDL_small_alloc(int, 6 * count, &isstack2);
if (xy && indices) {
int i;
float *ptr_xy = xy;
int *ptr_indices = indices;
const int xy_stride = 2 * sizeof(float);
const int num_vertices = 4 * count;
const int num_indices = 6 * count;
const int size_indices = 4;
int cur_index = 0;
for (i = 0; i < count; ++i) {
float minx, miny, maxx, maxy;
minx = rects[i].x;
miny = rects[i].y;
maxx = rects[i].x + rects[i].w;
maxy = rects[i].y + rects[i].h;
*ptr_xy++ = minx;
*ptr_xy++ = miny;
*ptr_xy++ = maxx;
*ptr_xy++ = miny;
*ptr_xy++ = maxx;
*ptr_xy++ = maxy;
*ptr_xy++ = minx;
*ptr_xy++ = maxy;
*ptr_indices++ = cur_index + rect_index_order[0];
*ptr_indices++ = cur_index + rect_index_order[1];
*ptr_indices++ = cur_index + rect_index_order[2];
*ptr_indices++ = cur_index + rect_index_order[3];
*ptr_indices++ = cur_index + rect_index_order[4];
*ptr_indices++ = cur_index + rect_index_order[5];
cur_index += 4;
}
result = renderer->QueueGeometry(renderer, cmd, NULL,
xy, xy_stride, &renderer->color, 0 /* color_stride */, NULL, 0,
num_vertices, indices, num_indices, size_indices,
1.0f, 1.0f);
if (!result) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
SDL_small_free(xy, isstack1);
SDL_small_free(indices, isstack2);
} else {
result = renderer->QueueFillRects(renderer, cmd, rects, count);
if (!result) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
}
return result;
}
static bool QueueCmdCopy(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_FRect *srcrect, const SDL_FRect *dstrect)
{
SDL_RenderCommand *cmd = PrepQueueCmdDraw(renderer, SDL_RENDERCMD_COPY, texture);
bool result = false;
if (cmd) {
result = renderer->QueueCopy(renderer, cmd, texture, srcrect, dstrect);
if (!result) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
return result;
}
static bool QueueCmdCopyEx(SDL_Renderer *renderer, SDL_Texture *texture,
const SDL_FRect *srcquad, const SDL_FRect *dstrect,
const double angle, const SDL_FPoint *center, const SDL_FlipMode flip, float scale_x, float scale_y)
{
SDL_RenderCommand *cmd = PrepQueueCmdDraw(renderer, SDL_RENDERCMD_COPY_EX, texture);
bool result = false;
if (cmd) {
result = renderer->QueueCopyEx(renderer, cmd, texture, srcquad, dstrect, angle, center, flip, scale_x, scale_y);
if (!result) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
return result;
}
static bool QueueCmdGeometry(SDL_Renderer *renderer, SDL_Texture *texture,
const float *xy, int xy_stride,
const SDL_FColor *color, int color_stride,
const float *uv, int uv_stride,
int num_vertices,
const void *indices, int num_indices, int size_indices,
float scale_x, float scale_y, SDL_TextureAddressMode texture_address_mode)
{
SDL_RenderCommand *cmd;
bool result = false;
cmd = PrepQueueCmdDraw(renderer, SDL_RENDERCMD_GEOMETRY, texture);
if (cmd) {
cmd->data.draw.texture_address_mode = texture_address_mode;
result = renderer->QueueGeometry(renderer, cmd, texture,
xy, xy_stride,
color, color_stride, uv, uv_stride,
num_vertices, indices, num_indices, size_indices,
scale_x, scale_y);
if (!result) {
cmd->command = SDL_RENDERCMD_NO_OP;
}
}
return result;
}
static void UpdateMainViewDimensions(SDL_Renderer *renderer)
{
int window_w = 0, window_h = 0;
if (renderer->window) {
SDL_GetWindowSize(renderer->window, &window_w, &window_h);
}
SDL_GetRenderOutputSize(renderer, &renderer->output_pixel_w, &renderer->output_pixel_h);
renderer->main_view.pixel_w = renderer->output_pixel_w;
renderer->main_view.pixel_h = renderer->output_pixel_h;
if (window_w > 0 && window_h > 0) {
renderer->dpi_scale.x = (float)renderer->main_view.pixel_w / window_w;
renderer->dpi_scale.y = (float)renderer->main_view.pixel_h / window_h;
} else {
renderer->dpi_scale.x = 1.0f;
renderer->dpi_scale.y = 1.0f;
}
UpdatePixelViewport(renderer, &renderer->main_view);
}
static void UpdateColorScale(SDL_Renderer *renderer)
{
float SDR_white_point;
if (renderer->target) {
SDR_white_point = renderer->target->SDR_white_point;
} else {
SDR_white_point = renderer->SDR_white_point;
}
renderer->color_scale = renderer->desired_color_scale * SDR_white_point;
}
static void UpdateHDRProperties(SDL_Renderer *renderer)
{
SDL_PropertiesID window_props;
SDL_PropertiesID renderer_props;
window_props = SDL_GetWindowProperties(renderer->window);
if (!window_props) {
return;
}
renderer_props = SDL_GetRendererProperties(renderer);
if (!renderer_props) {
return;
}
if (renderer->output_colorspace == SDL_COLORSPACE_SRGB_LINEAR) {
renderer->SDR_white_point = SDL_GetFloatProperty(window_props, SDL_PROP_WINDOW_SDR_WHITE_LEVEL_FLOAT, 1.0f);
renderer->HDR_headroom = SDL_GetFloatProperty(window_props, SDL_PROP_WINDOW_HDR_HEADROOM_FLOAT, 1.0f);
} else {
renderer->SDR_white_point = 1.0f;
renderer->HDR_headroom = 1.0f;
}
if (renderer->HDR_headroom > 1.0f) {
SDL_SetBooleanProperty(renderer_props, SDL_PROP_RENDERER_HDR_ENABLED_BOOLEAN, true);
} else {
SDL_SetBooleanProperty(renderer_props, SDL_PROP_RENDERER_HDR_ENABLED_BOOLEAN, false);
}
SDL_SetFloatProperty(renderer_props, SDL_PROP_RENDERER_SDR_WHITE_POINT_FLOAT, renderer->SDR_white_point);
SDL_SetFloatProperty(renderer_props, SDL_PROP_RENDERER_HDR_HEADROOM_FLOAT, renderer->HDR_headroom);
UpdateColorScale(renderer);
}
static void UpdateLogicalPresentation(SDL_Renderer *renderer);
int SDL_GetNumRenderDrivers(void)
{
#ifndef SDL_RENDER_DISABLED
return SDL_arraysize(render_drivers) - 1;
#else
return 0;
#endif
}
const char *SDL_GetRenderDriver(int index)
{
#ifndef SDL_RENDER_DISABLED
if (index < 0 || index >= SDL_GetNumRenderDrivers()) {
SDL_SetError("index must be in the range of 0 - %d",
SDL_GetNumRenderDrivers() - 1);
return NULL;
}
return render_drivers[index]->name;
#else
SDL_SetError("SDL not built with rendering support");
return NULL;
#endif
}
void SDL_RendererEventWatch(SDL_Renderer *renderer, SDL_Event *event)
{
SDL_Window *window = renderer->window;
if (renderer->WindowEvent) {
renderer->WindowEvent(renderer, &event->window);
}
if (event->type == SDL_EVENT_WINDOW_RESIZED ||
event->type == SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED ||
event->type == SDL_EVENT_WINDOW_METAL_VIEW_RESIZED) {
UpdateLogicalPresentation(renderer);
} else if (event->type == SDL_EVENT_WINDOW_HIDDEN) {
renderer->hidden = true;
} else if (event->type == SDL_EVENT_WINDOW_SHOWN) {
if (!(SDL_GetWindowFlags(window) & SDL_WINDOW_MINIMIZED)) {
renderer->hidden = false;
}
} else if (event->type == SDL_EVENT_WINDOW_MINIMIZED) {
renderer->hidden = true;
} else if (event->type == SDL_EVENT_WINDOW_RESTORED ||
event->type == SDL_EVENT_WINDOW_MAXIMIZED) {
if (!(SDL_GetWindowFlags(window) & SDL_WINDOW_HIDDEN)) {
renderer->hidden = false;
}
} else if (event->type == SDL_EVENT_WINDOW_DISPLAY_CHANGED ||
event->type == SDL_EVENT_WINDOW_HDR_STATE_CHANGED) {
UpdateHDRProperties(renderer);
}
}
bool SDL_CreateWindowAndRenderer(const char *title, int width, int height, SDL_WindowFlags window_flags, SDL_Window **window, SDL_Renderer **renderer)
{
bool hidden = (window_flags & SDL_WINDOW_HIDDEN) != 0;
if (!window) {
return SDL_InvalidParamError("window");
}
if (!renderer) {
return SDL_InvalidParamError("renderer");
}
// Hide the window so if the renderer recreates it, we don't get a visual flash on screen
window_flags |= SDL_WINDOW_HIDDEN;
*window = SDL_CreateWindow(title, width, height, window_flags);
if (!*window) {
*renderer = NULL;
return false;
}
*renderer = SDL_CreateRenderer(*window, NULL);
if (!*renderer) {
SDL_DestroyWindow(*window);
*window = NULL;
return false;
}
if (!hidden) {
SDL_ShowWindow(*window);
}
return true;
}
#ifndef SDL_RENDER_DISABLED
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. */
SDL_assert(renderer->QueueSetViewport != NULL);
SDL_assert(renderer->QueueSetDrawColor != NULL);
SDL_assert(renderer->QueueDrawPoints != NULL);
SDL_assert(renderer->QueueDrawLines != NULL || renderer->QueueGeometry != NULL);
SDL_assert(renderer->QueueFillRects != NULL || renderer->QueueGeometry != NULL);
SDL_assert(renderer->QueueCopy != NULL || renderer->QueueGeometry != NULL);
SDL_assert(renderer->RunCommandQueue != NULL);
}
static SDL_RenderLineMethod SDL_GetRenderLineMethod(void)
{
const char *hint = SDL_GetHint(SDL_HINT_RENDER_LINE_METHOD);
int method = 0;
if (hint) {
method = SDL_atoi(hint);
}
switch (method) {
case 1:
return SDL_RENDERLINEMETHOD_POINTS;
case 2:
return SDL_RENDERLINEMETHOD_LINES;
case 3:
return SDL_RENDERLINEMETHOD_GEOMETRY;
default:
return SDL_RENDERLINEMETHOD_POINTS;
}
}
static void SDL_CalculateSimulatedVSyncInterval(SDL_Renderer *renderer, SDL_Window *window)
{
SDL_DisplayID displayID = SDL_GetDisplayForWindow(window);
const SDL_DisplayMode *mode;
int refresh_num, refresh_den;
if (displayID == 0) {
displayID = SDL_GetPrimaryDisplay();
}
mode = SDL_GetDesktopDisplayMode(displayID);
if (mode && mode->refresh_rate_numerator > 0 && mode->refresh_rate_denominator > 0) {
refresh_num = mode->refresh_rate_numerator;
refresh_den = mode->refresh_rate_denominator;
} else {
// Pick a good default refresh rate
refresh_num = 60;
refresh_den = 1;
}
// Flip numerator and denominator to change from framerate to interval
renderer->simulate_vsync_interval_ns = (SDL_NS_PER_SECOND * refresh_den) / refresh_num;
}
#endif // !SDL_RENDER_DISABLED
SDL_Renderer *SDL_CreateRendererWithProperties(SDL_PropertiesID props)
{
#ifndef SDL_RENDER_DISABLED
SDL_Window *window = (SDL_Window *)SDL_GetPointerProperty(props, SDL_PROP_RENDERER_CREATE_WINDOW_POINTER, NULL);
SDL_Surface *surface = (SDL_Surface *)SDL_GetPointerProperty(props, SDL_PROP_RENDERER_CREATE_SURFACE_POINTER, NULL);
const char *driver_name = SDL_GetStringProperty(props, SDL_PROP_RENDERER_CREATE_NAME_STRING, NULL);
const char *hint;
SDL_PropertiesID new_props;
#ifdef SDL_PLATFORM_ANDROID
if (!Android_WaitActiveAndLockActivity()) {
return NULL;
}
#endif
SDL_Renderer *renderer = (SDL_Renderer *)SDL_calloc(1, sizeof(*renderer));
if (!renderer) {
goto error;
}
SDL_SetObjectValid(renderer, SDL_OBJECT_TYPE_RENDERER, true);
if ((!window && !surface) || (window && surface)) {
SDL_InvalidParamError("window");
goto error;
}
if (window && SDL_WindowHasSurface(window)) {
SDL_SetError("Surface already associated with window");
goto error;
}
if (window && SDL_GetRenderer(window)) {
SDL_SetError("Renderer already associated with window");
goto error;
}
hint = SDL_GetHint(SDL_HINT_RENDER_VSYNC);
if (hint && *hint) {
SDL_SetNumberProperty(props, SDL_PROP_RENDERER_CREATE_PRESENT_VSYNC_NUMBER, SDL_GetHintBoolean(SDL_HINT_RENDER_VSYNC, true));
}
if (surface) {
#ifdef SDL_VIDEO_RENDER_SW
const bool rc = SW_CreateRendererForSurface(renderer, surface, props);
#else
const bool rc = SDL_SetError("SDL not built with software renderer");
#endif
if (!rc) {
goto error;
}
} else {
bool rc = false;