int do_attributes(GPU_Target* screen)
{
GPU_LogError("do_attributes()\n");
GPU_Image* image = GPU_LoadImage("data/small_test.png");
if(image == NULL)
return -1;
int return_value = 0;
float dt = 0.010f;
Uint32 startTime = SDL_GetTicks();
long frameCount = 0;
int maxSprites = 50000;
int numSprites = 101;
// 2 pos floats per vertex, 2 texcoords, 4 color components
int floats_per_vertex = 2 + 2 + 4;
int floats_per_sprite = floats_per_vertex*4;
float* sprite_values = (float*)malloc(sizeof(float)*maxSprites*floats_per_sprite);
// Load attributes for the textured shader
Uint32 program_object = 0;
GPU_ActivateShaderProgram(program_object, NULL);
// Disable the default shader's attributes (not a typical thing to do...)
GPU_ShaderBlock block = {-1,-1,-1,GPU_GetUniformLocation(program_object, "gpu_ModelViewProjectionMatrix")};
GPU_ActivateShaderProgram(program_object, &block);
GPU_Attribute attributes[3] = {
GPU_MakeAttribute(GPU_GetAttributeLocation(program_object, "gpu_Vertex"), sprite_values,
GPU_MakeAttributeFormat(2, GPU_TYPE_FLOAT, 0, floats_per_vertex*sizeof(float), 0)),
GPU_MakeAttribute(GPU_GetAttributeLocation(program_object, "gpu_TexCoord"), sprite_values,
GPU_MakeAttributeFormat(2, GPU_TYPE_FLOAT, 0, floats_per_vertex*sizeof(float), 2*sizeof(float))),
GPU_MakeAttribute(GPU_GetAttributeLocation(program_object, "gpu_Color"), sprite_values,
GPU_MakeAttributeFormat(4, GPU_TYPE_FLOAT, 0, floats_per_vertex*sizeof(float), 4*sizeof(float)))
};
float* velx = (float*)malloc(sizeof(float)*maxSprites);
float* vely = (float*)malloc(sizeof(float)*maxSprites);
int i;
int val_n = 0;
for(i = 0; i < maxSprites; i++)
{
float x = rand()%screen->w;
float y = rand()%screen->h;
sprite_values[val_n++] = x - image->w/2;
sprite_values[val_n++] = y - image->h/2;
sprite_values[val_n++] = 0;
sprite_values[val_n++] = 0;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = x + image->w/2;
sprite_values[val_n++] = y - image->h/2;
sprite_values[val_n++] = 1;
sprite_values[val_n++] = 0;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = x + image->w/2;
sprite_values[val_n++] = y + image->h/2;
sprite_values[val_n++] = 1;
sprite_values[val_n++] = 1;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = x - image->w/2;
sprite_values[val_n++] = y + image->h/2;
sprite_values[val_n++] = 0;
sprite_values[val_n++] = 1;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = rand()%101/100.0f;
sprite_values[val_n++] = rand()%101/100.0f;
velx[i] = 10 + rand()%screen->w/10;
vely[i] = 10 + rand()%screen->h/10;
if(rand()%2)
velx[i] = -velx[i];
if(rand()%2)
vely[i] = -vely[i];
}
Uint8 done = 0;
SDL_Event event;
while(!done)
{
while(SDL_PollEvent(&event))
{
if(event.type == SDL_QUIT)
done = 1;
else if(event.type == SDL_KEYDOWN)
{
if(event.key.keysym.sym == SDLK_ESCAPE)
done = 1;
else if(event.key.keysym.sym == SDLK_SPACE)
{
done = 1;
return_value = 1;
}
else if(event.key.keysym.sym == SDLK_EQUALS || event.key.keysym.sym == SDLK_PLUS)
{
if(numSprites < maxSprites)
numSprites += 100;
GPU_LogError("Sprites: %d\n", numSprites);
frameCount = 0;
startTime = SDL_GetTicks();
}
else if(event.key.keysym.sym == SDLK_MINUS)
{
if(numSprites > 1)
numSprites -= 100;
if(numSprites < 1)
numSprites = 1;
GPU_LogError("Sprites: %d\n", numSprites);
frameCount = 0;
startTime = SDL_GetTicks();
}
}
}
GPU_Clear(screen);
for(i = 0; i < numSprites; i++)
{
val_n = floats_per_sprite*i;
float x = sprite_values[val_n] + image->w/2;
float y = sprite_values[val_n+1] + image->h/2;
x += velx[i]*dt;
y += vely[i]*dt;
if(x < 0)
{
x = 0;
velx[i] = -velx[i];
}
else if(x > screen->w)
{
x = screen->w;
velx[i] = -velx[i];
}
if(y < 0)
{
y = 0;
vely[i] = -vely[i];
}
else if(y > screen->h)
{
y = screen->h;
vely[i] = -vely[i];
}
sprite_values[val_n] = x - image->w/2;
sprite_values[val_n+1] = y - image->h/2;
val_n += floats_per_vertex;
sprite_values[val_n] = x + image->w/2;
sprite_values[val_n+1] = y - image->h/2;
val_n += floats_per_vertex;
sprite_values[val_n] = x + image->w/2;
sprite_values[val_n+1] = y + image->h/2;
val_n += floats_per_vertex;
sprite_values[val_n] = x - image->w/2;
sprite_values[val_n+1] = y + image->h/2;
}
//float color[4] = {0.5f, 0, 0, 1.0f};
//GPU_SetAttributefv(attributes[2].location, 4, color);
GPU_SetAttributeSource(numSprites*4, attributes[0]);
GPU_SetAttributeSource(numSprites*4, attributes[1]);
GPU_SetAttributeSource(numSprites*4, attributes[2]);
GPU_BlitBatch(image, screen, numSprites, NULL, 0);
GPU_Flip(screen);
frameCount++;
if(SDL_GetTicks() - startTime > 5000)
{
printf("Average FPS: %.2f\n", 1000.0f*frameCount/(SDL_GetTicks() - startTime));
frameCount = 0;
startTime = SDL_GetTicks();
}
}
printf("Average FPS: %.2f\n", 1000.0f*frameCount/(SDL_GetTicks() - startTime));
free(sprite_values);
free(velx);
free(vely);
GPU_FreeImage(image);
// Reset the default shader's block
GPU_ActivateShaderProgram(screen->context->default_textured_shader_program, NULL);
return return_value;
}
int do_attributes(GPU_Target* screen)
{
Uint32 startTime;
long frameCount;
Uint8 done;
SDL_Event event;
int return_value = 0;
float dt = 0.010f;
int max_vertices = 60000;
int num_vertices = 303;
float* velx = (float*)malloc(sizeof(float)*max_vertices/3);
float* vely = (float*)malloc(sizeof(float)*max_vertices/3);
int i;
// 2 pos floats per vertex, 2 texcoords, 4 color components
int floats_per_vertex = 2 + 2 + 4;
float* vertex_values = (float*)malloc(sizeof(float)*max_vertices*floats_per_vertex);
Uint32 program_object;
GPU_Attribute attributes[3];
GPU_Image* image = GPU_LoadImage("data/small_test.png");
GPU_LogError("do_attributes()\n");
if(image == NULL)
return -1;
startTime = SDL_GetTicks();
frameCount = 0;
fill_vertex_values(vertex_values, velx, vely, max_vertices, screen, image);
// Load attributes for the textured shader
program_object = 0;
GPU_ActivateShaderProgram(program_object, NULL);
// Disable the default shader's attributes (not a typical thing to do...)
{
GPU_ShaderBlock block = {-1,-1,-1,GPU_GetUniformLocation(program_object, "gpu_ModelViewProjectionMatrix")};
GPU_ActivateShaderProgram(program_object, &block);
}
attributes[0] = GPU_MakeAttribute(GPU_GetAttributeLocation(program_object, "gpu_Vertex"), vertex_values,
GPU_MakeAttributeFormat(2, GPU_TYPE_FLOAT, 0, floats_per_vertex*sizeof(float), 0));
attributes[1] = GPU_MakeAttribute(GPU_GetAttributeLocation(program_object, "gpu_TexCoord"), vertex_values,
GPU_MakeAttributeFormat(2, GPU_TYPE_FLOAT, 0, floats_per_vertex*sizeof(float), 2 * sizeof(float)));
attributes[2] = GPU_MakeAttribute(GPU_GetAttributeLocation(program_object, "gpu_Color"), vertex_values,
GPU_MakeAttributeFormat(4, GPU_TYPE_FLOAT, 0, floats_per_vertex*sizeof(float), 4 * sizeof(float)));
done = 0;
while(!done)
{
while(SDL_PollEvent(&event))
{
if(event.type == SDL_QUIT)
done = 1;
else if(event.type == SDL_KEYDOWN)
{
if(event.key.keysym.sym == SDLK_ESCAPE)
done = 1;
else if(event.key.keysym.sym == SDLK_SPACE)
{
done = 1;
return_value = 4;
}
else if(event.key.keysym.sym == SDLK_EQUALS || event.key.keysym.sym == SDLK_PLUS)
{
num_vertices += 300;
if(num_vertices > max_vertices)
num_vertices = max_vertices;
GPU_LogError("Vertices: %d\n", num_vertices);
frameCount = 0;
startTime = SDL_GetTicks();
}
else if(event.key.keysym.sym == SDLK_MINUS)
{
if(num_vertices > 3)
num_vertices -= 300;
if(num_vertices < 3)
num_vertices = 3;
GPU_LogError("Vertices: %d\n", num_vertices);
frameCount = 0;
startTime = SDL_GetTicks();
}
}
}
GPU_Clear(screen);
// FIXME: Can cause squishing when a vertex hits a wall...
for(i = 0; i < num_vertices; i++)
{
int n = i/3;
int val_n = floats_per_vertex*i;
vertex_values[val_n] += velx[n]*dt;
vertex_values[val_n+1] += vely[n]*dt;
if(vertex_values[val_n] < 0)
{
vertex_values[val_n] = 0;
velx[n] = -velx[n];
}
else if(vertex_values[val_n] > screen->w)
{
vertex_values[val_n] = screen->w;
velx[n] = -velx[n];
}
if(vertex_values[val_n+1] < 0)
{
vertex_values[val_n+1] = 0;
vely[n] = -vely[n];
}
else if(vertex_values[val_n+1] > screen->h)
{
vertex_values[val_n+1] = screen->h;
vely[n] = -vely[n];
}
}
GPU_SetAttributeSource(num_vertices, attributes[0]);
GPU_SetAttributeSource(num_vertices, attributes[1]);
GPU_SetAttributeSource(num_vertices, attributes[2]);
GPU_TriangleBatch(image, screen, num_vertices, NULL, 0, NULL, GPU_NONE);
GPU_Flip(screen);
frameCount++;
if(SDL_GetTicks() - startTime > 5000)
{
printf("Average FPS: %.2f\n", 1000.0f*frameCount/(SDL_GetTicks() - startTime));
frameCount = 0;
startTime = SDL_GetTicks();
}
}
printf("Average FPS: %.2f\n", 1000.0f*frameCount/(SDL_GetTicks() - startTime));
free(vertex_values);
free(velx);
free(vely);
GPU_FreeImage(image);
// Reset the default shader's block
GPU_ActivateShaderProgram(screen->context->default_textured_shader_program, NULL);
return return_value;
}