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Use normalized texture coordinates

This commit is contained in:
Sylvain 2021-03-17 09:58:49 +01:00 committed by Sylvain Becker
parent 5828cc415a
commit f73c1eff10
7 changed files with 13 additions and 19 deletions
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4
include/SDL_render.h
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@ -144,8 +144,7 @@ typedef struct SDL_Vertex
{
SDL_FPoint position; /**< Vertex position, in SDL_Renderer coordinates */
SDL_Color color; /**< Vertex color */
SDL_FPoint tex_coord; /**< Texture coordinates (0..texture width, 0..texture height),
if needed */
SDL_FPoint tex_coord; /**< Normalized texture coordinates, if needed */
} SDL_Vertex;
@ -1472,7 +1471,6 @@ extern DECLSPEC int SDLCALL SDL_RenderGeometry(SDL_Renderer *renderer,
SDL_Vertex *vertices, int num_vertices,
int *indices, int num_indices);
/**
* Read pixels from the current rendering target to an array of pixels.
*

2
src/render/SDL_render.c
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@ -3369,7 +3369,7 @@ SDL_RenderGeometry(SDL_Renderer *renderer,
if (texture) {
for (i = 0; i < num_vertices; ++i) {
if (vertices[i].tex_coord.x < 0 || vertices[i].tex_coord.y < 0 || vertices[i].tex_coord.x >= texture->w || vertices[i].tex_coord.y >= texture->h) {
if (vertices[i].tex_coord.x < 0.0f || vertices[i].tex_coord.y < 0.0f || vertices[i].tex_coord.x > 1.0f || vertices[i].tex_coord.y > 1.0f) {
return SDL_SetError("Values of 'vertices' out of bounds");
}
}

4
src/render/direct3d11/SDL_render_d3d11.c
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@ -1891,8 +1891,8 @@ D3D11_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture
verts->color.w = v->color.a / 255.0f;
if (texture) {
verts->tex.x = v->tex_coord.x / texture->w;
verts->tex.y = v->tex_coord.y / texture->h;
verts->tex.x = v->tex_coord.x;
verts->tex.y = v->tex_coord.y;
} else {
verts->tex.x = 0.0f;
verts->tex.y = 0.0f;

10
src/render/metal/SDL_render_metal.m
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@ -1381,12 +1381,8 @@ static int
METAL_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture *texture,
SDL_Vertex *vertices, int num_vertices, int *indices, int num_indices, float scale_x, float scale_y)
{
const float texw = (float) (texture ? texture->w : 0);
const float texh = (float) (texture ? texture->h : 0);
int count = indices ? num_indices : num_vertices;
int i;
int sz = 2 + 4 + (texture ? 2 : 0);
const size_t vertlen = sizeof (float) * sz * count;
float *verts = (float *) SDL_AllocateRenderVertices(renderer, vertlen, DEVICE_ALIGN(8), &cmd->data.draw.first);
if (!verts) {
@ -1395,7 +1391,7 @@ METAL_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture
cmd->data.draw.count = count;
for (i = 0; i < count; i++) {
for (int i = 0; i < count; i++) {
SDL_Vertex *v = &vertices[indices ? indices[i] : i];
*(verts++) = v->position.x * scale_x;
@ -1407,8 +1403,8 @@ METAL_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture
*(verts++) = v->color.a * inv255f;
if (texture) {
*(verts++) = normtex(v->tex_coord.x, texw);
*(verts++) = normtex(v->tex_coord.y, texh);
*(verts++) = v->tex_coord.x;
*(verts++) = v->tex_coord.y;
}
}

4
src/render/opengl/SDL_render_gl.c
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@ -1085,8 +1085,8 @@ GL_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture *te
*(verts++) = v->color.a * inv255f;
if (texture) {
*(verts++) = (v->tex_coord.x / texture->w) * texturedata->texw;
*(verts++) = (v->tex_coord.y / texture->h) * texturedata->texh;
*(verts++) = v->tex_coord.x * texturedata->texw;
*(verts++) = v->tex_coord.y * texturedata->texh;
}
}
return 0;

4
src/render/opengles2/SDL_render_gles2.c
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@ -986,8 +986,8 @@ GLES2_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture
*(verts++) = v->color.a * inv255f;
if (texture) {
*(verts++) = v->tex_coord.x / texture->w;
*(verts++) = v->tex_coord.y / texture->h;
*(verts++) = v->tex_coord.x;
*(verts++) = v->tex_coord.y;
}
}
return 0;

4
src/render/software/SDL_render_sw.c
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@ -596,8 +596,8 @@ SW_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture *te
for (i = 0; i < count; i++) {
SDL_Vertex *v = &vertices[indices ? indices[i] : i];
ptr->src.x = v->tex_coord.x;
ptr->src.y = v->tex_coord.y;
ptr->src.x = v->tex_coord.x * texture->w;
ptr->src.y = v->tex_coord.y * texture->h;
ptr->dst.x = v->position.x * scale_x + renderer->viewport.x;
ptr->dst.y = v->position.y * scale_y + renderer->viewport.y;