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Add OpenGLES implementation

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Sylvain 2021-04-01 23:30:59 +02:00 committed by Sylvain Becker
parent 32e7910135
commit eff840bb9b
2 changed files with 86 additions and 0 deletions
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1
src/render/opengles/SDL_glesfuncs.h
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@ -27,6 +27,7 @@ SDL_PROC_OES(void, glBlendFuncSeparateOES, (GLenum, GLenum, GLenum, GLenum))
SDL_PROC(void, glClear, (GLbitfield))
SDL_PROC(void, glClearColor, (GLclampf, GLclampf, GLclampf, GLclampf))
SDL_PROC(void, glColor4f, (GLfloat, GLfloat, GLfloat, GLfloat))
SDL_PROC(void, glColorPointer, (GLint, GLenum, GLsizei, const GLvoid *))
SDL_PROC(void, glDeleteTextures, (GLsizei, const GLuint *))
SDL_PROC(void, glDisable, (GLenum))
SDL_PROC(void, glDisableClientState, (GLenum array))

85
src/render/opengles/SDL_render_gles.c
View file

@ -755,6 +755,63 @@ GLES_QueueCopyEx(SDL_Renderer * renderer, SDL_RenderCommand *cmd, SDL_Texture *
return 0;
}
static int
GLES_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture *texture,
const float *xy, int xy_stride, const int *color, int color_stride, const float *uv, int uv_stride,
int num_vertices, const void *indices, int num_indices, int size_indice,
float scale_x, float scale_y)
{
GLES_TextureData *texturedata = NULL;
int i;
int count = indices ? num_indices : num_vertices;
GLfloat *verts;
int sz = 2 + 4 + (texture ? 2 : 0);
verts = (GLfloat *) SDL_AllocateRenderVertices(renderer, count * sz * sizeof (GLfloat), 0, &cmd->data.draw.first);
if (!verts) {
return -1;
}
if (texture) {
texturedata = (GLES_TextureData *) texture->driverdata;
}
cmd->data.draw.count = count;
for (i = 0; i < count; i++) {
int j;
float *xy_;
SDL_Color col_;
if (size_indice == 4) {
j = ((const Uint32 *)indices)[i];
} else if (size_indice == 2) {
j = ((const Uint16 *)indices)[i];
} else if (size_indice == 1) {
j = ((const Uint8 *)indices)[i];
} else {
j = i;
}
xy_ = (float *)((char*)xy + j * xy_stride);
col_ = *(SDL_Color *)((char*)color + j * color_stride);
*(verts++) = xy_[0] * scale_x;
*(verts++) = xy_[1] * scale_y;
*(verts++) = col_.r * inv255f;
*(verts++) = col_.g * inv255f;
*(verts++) = col_.b * inv255f;
*(verts++) = col_.a * inv255f;
if (texture) {
float *uv_ = (float *)((char*)uv + j * uv_stride);
*(verts++) = uv_[0] * texturedata->texw;
*(verts++) = uv_[1] * texturedata->texh;
}
}
return 0;
}
static void
SetDrawState(GLES_RenderData *data, const SDL_RenderCommand *cmd)
{
@ -988,6 +1045,33 @@ GLES_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vert
break;
}
case SDL_RENDERCMD_GEOMETRY: {
const GLfloat *verts = (GLfloat *) (((Uint8 *) vertices) + cmd->data.draw.first);
SDL_Texture *texture = cmd->data.draw.texture;
const size_t count = cmd->data.draw.count;
int stride = (2 + 4 + (texture ? 2 : 0)) * sizeof (float);
if (texture) {
SetCopyState(data, cmd);
} else {
SetDrawState(data, cmd);
}
data->glEnableClientState(GL_COLOR_ARRAY);
data->glVertexPointer(2, GL_FLOAT, stride, verts);
data->glColorPointer(4, GL_FLOAT, stride, verts + 2);
if (texture) {
data->glTexCoordPointer(2, GL_FLOAT, stride, verts + 2 + 4);
}
data->glDrawArrays(GL_TRIANGLES, 0, (GLsizei) count);
data->glDisableClientState(GL_COLOR_ARRAY);
break;
}
case SDL_RENDERCMD_NO_OP:
break;
}
@ -1198,6 +1282,7 @@ GLES_CreateRenderer(SDL_Window * window, Uint32 flags)
renderer->QueueFillRects = GLES_QueueFillRects;
renderer->QueueCopy = GLES_QueueCopy;
renderer->QueueCopyEx = GLES_QueueCopyEx;
renderer->QueueGeometry = GLES_QueueGeometry;
renderer->RunCommandQueue = GLES_RunCommandQueue;
renderer->RenderReadPixels = GLES_RenderReadPixels;
renderer->RenderPresent = GLES_RenderPresent;